Yes @Dhanush_RP  this issue has been fixed. Nothing changed on the classification itself. It was a product fix from Adobe. I guess if you still see this issue you can raise a support ticket.

My issue has been fixed. Nothing changed on the classification itself. It was a product fix from Adobe. I guess if you still see this issue you can raise a support ticket.

I do not see any error's when running test as you can see below. Also both of them exist in report suite and I can save this classification if I remove either "Product Availability Buckets" or "Product Availability Sections"  

I have not tried that but I am only creating classifications on same report suite across as you mentioned. I believe the problem is that we can split the values from regex and assign to different  classifications of same evar but can not do that with contains or other regex'es.

Yes, both of those settings are correct. The rule works if I remove either of the levels i.e setting alone on "Bucket" or "Section" works but not able to do both.

I have a classification rule built as below. I am able to validate this rule however I am not able to activate this rule wit multiple classifications level  Error message comes like this: